Disable pause frame response in windcharger.

By default, pause frame is responeded in driver's workflow.
In RG, this feature is disable, so follow the same rule.

bug=21635492

Change-Id: I143e76174f864c82667df4f261aeae47f75e4ef4
diff --git a/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c b/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
index c461f2d..a657a3d 100755
--- a/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
+++ b/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
@@ -430,8 +430,7 @@
 }
 
 #define MAC_CFG1_INIT	(MAC_CFG1_RXE | MAC_CFG1_TXE | \
-			 MAC_CFG1_SRX | MAC_CFG1_STX | \
-			 MAC_CFG1_TFC | MAC_CFG1_RFC)
+			 MAC_CFG1_SRX | MAC_CFG1_STX)
 
 #define FIFO_CFG0_INIT	(FIFO_CFG0_ALL << FIFO_CFG0_ENABLE_SHIFT)